What is the purpose of DNA supercoiling?
What will be an ideal response?
nucleoid chromosomal compaction
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Which of the following protein classes are not found as membrane proteins?
A. transport channels B. hormones C. receptors D. enzymes E. identity markers
Fertilization take place within a woman's body in which of the following ART techniques?
a. GIFT b. ICSI c. IVF d. ZIFT e. PGD
Each renal calyx
A. is a funnel-shaped structure. B. surrounds the tip of a renal pyramid. C. joins to form the renal pelvis. D. has all of these characteristics. E. has none of these characteristics.
Scientists have discovered gene products, including the hormone ELH, that control all components of egg-laying behavior in Aplysia slugs. This discovery confirms that
A. the egg-laying behavior has absolutely no nervous system involvement. B. genes can control endocrine gland secretions that control behavior. C. this slug could avoid being eaten by garter snakes. D. genes only influence physiology and structure but not behavior. E. the egg-laying behavior is innate or hardwired into the slug's brain.